I would agree with Christine, looks to be Murano to me. From what i can see it does have a fair bit of wear to the base (I believe it is a polished base) which would suggest it has a bit of age not the it is badly finished or that its American.Its probably from the 1960's, and personally I think it looks to have reasonable quality with the gold adventurine detail

Handmade glass is likely to have bubbles in it, so unless the seller is being really fastidious in their listing or if the bubble is burst at the surface then most sellers won't mention one little bubble. Your piece looks reasonably good quality with the gold leaf in it and not low-end at all.

hummmm, the bubble is right in the centre and very close to the surface.I've left it too long to do anything about it now.I need to have a go at photographing the base again in sunlight without flash so I can zoom right in. It isn't wear on the base it's a part of the production, 99.99% sure of that.